Track-scale



J. H. A. BOUSFIELD.

TRACK SCALE.

APPLICATION man SEPT. \3. |915.

1,3 13,577 laltentod Aug. 19, 1919.

2 SHEES-SHET 2.

se, WAMMJlLl/m UNITED nSTATES PATENT OFFICE.

JOHN H. A. BOUSI'ILD, OF ST. JOHNSB FAIBBANKS AN D COMPANY, OF ST. JO

VERMONT.

URY, VERMONT, assIeNon. rro :a AND T. mrsnumr, vsnmonr, a conrona'rIoN es TEACH-SCALE.

Specification of Letten Patent.

Ilatented Aug. 19, 1919.

Application nled September 18, 1915. Serial No. 50,332.

provements in Track-Scales, of which the.

following is a s ecification, reference being had therein to t e accompanying drawings.

The invention relates to track s cales and more' particularly to the construction of the connection between the extension levers and the so-called fifth lever of the scale. It 1s the object of the invention to eliminate torsional stresses and to obtain a central connection between the extension levers and fifth lever as hereinafter set forth. y

In the drawin Figure 1 is a side elevation of the connection;

Fig; 2 is a sectional plan thereof;

Fig. 3 is a transverse section; and 4 Fig. 4 is a vertical section through the connecting linkage.

In the construction of railway track scales, it is usual to provide a double system of extension levers, the end levers oieach system being op sitcly arranged adjacent to each other an bein connected with a so-called fifth lever whic transmits the load to the beam. As the supporting pivots for the two extension levers are se arated from each other an uns mmetrical oading of the scale will result in unequal stresses u on these pivots and their connections to the fth lever, which results ln a latter. This defect I have overcome by my improved construction which is such that tho pull upon the fifth lever is centrall1 and in t ie plane of movement thereof; an furthermore, unsymmetrical loading of the scale latform will have no e'ect in altering the irection of stresses.

In detail, A and B are the end extension levers of the two systems which are arranged in alnement with each other. C and D are nose irons attached to the ends of the respcctive levers, the member C bein bifurcated to embrace the member D. Each of the furcatione 'of the memer C is further bifurcated as indicated at E E E' E'. F and F are knife-ed e ivots extending across the furcations .El E' res ectivoly. G is a hiife-edge\pivot secu to.

central plane o torsional strain upon the Eclips by loosening the nose iron D and extending between furcations H and H thereof in alinement with the knife-edge pivots F and F.

I is the fifth lever which is arranged in a transverse plane and is provided with a. knife-edge pivot J. This pivot extends between furcations of the lever I and is arranged beneath the pivots F F and G, but at rightl angles thereto. K is a connection between the extension -levers and fifth lever,

which comprises a bearing for. each of the knife-edge pivots and an evener cou ling therebetween. Specifically L are the rings for the pivote F F and G, which are connected to eye-bar links M byivot-pins N. The lower ends of these inks are. connected by pivot-pins O with an evener lever P, and upon the central pivotO is also mounted a hanger Q. This hanger has depending therefrom e e-bolts R and R', which embrace a bearing for en gement with the knife-edge pivot J. T 1s a pivot-pin connecting the eye-bolts with the bearing S.

The connecting member constructed as described will transmit the load fromeither of the systems of levers tothe fifth lever without torsional stress upon any of the levers. Thus where the load which is transmitted through the nose piece C diers from that transmitted through the nose piece D, it will nevertheless be centralized, as the pivots F and F are arranged symmetrically u on'opposite sides of the the lever. 'Also the eyebars M to ther with the evener lever-P will combinet e une ual stresses on-the levers A and B i'hto a sing e central stress transmitted through the hanger ,Q and eye-bolts Rio the bearin S and pivot J.

To acilitate the alinement of the pivots the nose irons C andD are adjustable upon their. respective levers, preferably by connecting theni with a screw U extending longitudinally of the levers. Provision is also made for alinement of 'theeye-bars and to compensate for any slight disalinement of the pivots. This is accomplished by providin the pivot-pins N with threaded portions on opposite sides of the bearing and clamping nuts W for en agin said threaded portions and the si es o the, bearing.

the nuts W the pins may nljusted longitudinally of their axes or transversely -of the bearing blocks.` The` eye-bars M preferabl engage shoulders on the pins O and are held thereagainst by cotter-pins X.- 'lhus the longitudinal adjustment of the pins O in relation to the bearing blocks will eii'ect a corresponding adjustment of the eye-bars. It is therefore possible by means of these adjustments to eliminate all torsional stresses.

What I claim as my invent-ion is:-

l. In a track scale, the combination with a plurality of levers and a lever extending transversely thereof, of a connection between said lirst mentioned levers and said other lever arranged symmetrically of the line formed by the intersection of vertical planes in which the axes of the levers are respectively situated and adjustment means for maintaining said symmetrical arrangement.

'2. In a track scale, the combination with oppositely-extending end levers ar 'anged in a. common plane, of a` bifurcated nose iron on oneend lever and a nose iron 0n the other end lever embraced thereby, transverse pivots in the fum-ations of said bit'urcated nose iron and said central nose iron in substantial alinement with each other, bearings for engaging the several pivots, a central link for connecting wilh a fifth lever. and an evener' connection between said central .linkl and the several bearings.

3. In a track scale, the combination with `oppositely-extending levers, the end of one being bifureatcd to embrace the end of the other, of transverse pivots on said bfurcated and interna-diate lever in substantial alinement, independent bearing blocks for .en-

aging the several pivots, links depending rom said bearing blocks, an evener lever with which said links are connectml, and means for laterally adjusting said bearings with respect to their connecting links to compensate for inaweuracics in alinement of the pivots.

4. In a track scale. the combination with oppositely-extending ievers arranged in the same plane, of a nose iron on one of said levers, a bifurcated nose iron on the opposite lever embracing said lirstmentioned nose-- b1furcated nose iron and on said first-mentionedl and iron, pivots on the fui-cations of said nose iron in fsubstantial alinlement, means for adjusting said nose irons with respent to their levers to aline said pivots,

5. In a track scale, the combination with oppositely-extending levers arranged in a Yand means for adjusting said connection to compensate for inaccuracies in alinement.

(i. In a track scale., the combination with a plurality of extension levers having adjacent ends, one of which has one pivot and the other of which has a plurality of pivots, ot' a. fifth lever having a pivot, a connector between the extension levers and fifth lever comprising a plurality of bearings for engagement with the pivots of the several leverslinks pivotally connected to each of the bearings and an evener between said links connected at its center to the link pivotally connected` to the bearing of the tifth lever and to the link pivotally connected to the bearing of one of the extension levers and at its opposite ends to the link pivotally connected to the bearings of the other of the extension levers.A

T. In a track scale, the combination with oppositely-extending and alined levers, one et said levers having a transverse pivot and the other of said levers having transverse pivots in symmetrical relation to said first mentioned pivot and in substantial alinement therewith, bearings for engaging all of said pivots, an evener lever, means for connecting said evener lever and said bearings, a fifth lever and a link connected eentrally to said evener lever and to said iit'tn lever.

8. In a track scale, the combination with oppositely-extending levers arranged in the same pli/ine, levers, abifurcated nose iron on the opposite lever embracing said first-mentioned noso iron. pivots on the furcations of 'said bifurcated n ose iron and on `said first-mentioned nose iron in substantial alinement, means .for adjusting said nose irons longitudinally of their levers, and means for adjusting said pivots longitudinally of their axes.

ln testimony whereof I atiix my signature in -presence of two Witnesses.

OsMAaA. ULLRICH,

(ino. R. Baumann. l

of a nose iroir on one of said 

